1. This FS-U4-Pro will add four USB 3.0 ports on your desktop computer by PCI Express(1X) slot .The super fast USB 3.0 ports will provide 5Gbps max data(total) transfer speed for video ,audio ,photos or files.2. Build in Self-Powered Technology-Users do not need to plug any additional power cable on board(only PCIe slot)and get each ports 2A (8A in total) max power supply for high power-consuming data device like Hard drive disc. Enjoy super easy installation with Plug Play use.3. Based on RENESAS NEC high performance chipset with more technology.4X added power module provide 4X2 ampere current ensure adequate power supply for USB device.4X electric circuit protector and voltage stable capacitance protect data safety than ever.4. Compatible System: 1.Plug and Play on Windows 10,8.1,8(32/64bit) and Windows Server 2012,2012R2,2016,2019.2.Need to Install Driver on Windows XP,Vista,7(32/64bit) and Windows Server 2003,2003R2,2008,2008R2(32/64bit),NOT for MAC OS. Comply with PCI Express X1,X4,X8,X16 slot,NOT for PCI Slot.5. WARNING: 1. Please Install Driver for for USB Card on PCs. 2. Not works on Mini Size PCs,No Low Profile Bracket inside. 3. Make Sure PCs Mother Board have Spare PCIe Slot for PCIe USB card. 4. Make Sure your USB Device is USB 3.0 or Cant get USB 3.0 Speed.Internal USB card from mother board though a PCI Express slot-Ensure stable connection,lost few data transfer speed. Do not have lost connection issue like external USB HUB does.Added on USB 3.0 card will not use CPU USB Main Lan,will just add 1+ USB 3.0 lane 5Gbps bandwidth on mother board,will not speed down the USB 3.0 main lane.Colour: as shownMaterial: ABSSize: 12 x 8.8 x 8.4cmPackage Contents:1 x PCI Express Expansion CardOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.